Frederick



E W. LOCKWOOD & B- T- FREDERICK Cast Iron Sleigh Runner. ,556. PatentedFeb. '18; 1868.

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E. w. LOOKWOOD AND B. T. FREDERICK, OF IMARSHALLTOWN, IOWA.

Letters Patent lV'a. 74,556, dated February-18, 1868. l

IMPROVEMENT IN CAST-IRON SLEIGH-RUNNERS.

TO ALL WHOM IT'MAY CONCERN:

Be it. known that we, E.'W. LOCKWOOD' and B. T. FREDERICK, ofMarshalltown, in the county of Marshall, and-State of Iowa,haveinv'ented anew and useful Improvement in Bob or Sled-Runners; and wedo hereby declare that the following is a full, clear, and exactdescription thereofi which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, and in which-- 7 Figure 1 is a sideelevation of our improved bob or sled-runner.

t Figure 2 is a top or plan view of the same; and

Figure 3 a rear end elevation of one runner and knee. p

This invention relates to an improvement in the construction ofcast-metal bob or sled-runners; and it con-- siets in the constructionof the runner and knees, the latter being provided 'with supports forthe raves, all cast in one. piece. 7

Similar letters of reference indicate like parts in the several figures,

D is the runner, curved at itsforward end, as shown in the drawings, andextending back suiliciently to form a shoulder, g, for the reception ofthe end of the rave, On the outside of the runner, at its lower edge, a

flange, F; is formed to incrense the width of theb earing-surface. B Bare the knees, of inverted'U-shape, and cast with the runners D, theircurved portions being uppermost, and provided at the central part ofsuch curve with horizontal supports a, for the reception of thecross-bars and raves. These supports are placed transversely of theknees, and slotted at each end for the passage of thebolts by which theyare securedto the cross-cars. The lower portions of the knees are nearlyvertical' but their upper portions are curved inward, as shown in fig.3t 1 By this construction they form an cfl'ectual brace against alllateral movement, and enable the face of the runner to be alwaysparallel with the upper surface of the support 0.

It has been discovered that by making the knee V-shape iu-theirtransverse section, greater strength is obtained, where they act asbraces for the runners and cross-bars, than by making them round orsquare.

Having thus described our invention, whet we claim as new, and desire tosecure-by Letters Patent, is-

1. The U-shnped metallic knees 13, provided upon their upper curvedsides with the slotted horizontal supports a, the runners D, having theshoulderg for the reception of the end of the rave, all cast in onepiece, substantially as described for the purpose specified. l i

2. The metallic kne'es B, when made V-shapecl in theirtransverse'section, and curved vertically, to forms brace forthe runnersD and supports 0, substantially as described for the purpose specified.I

E. W. LOGKWOOD,

B. T. FREDERICK;

Witnesses:

Jivo. P. Woonmmr, T. B. ABELL.

